fdo#75380: Let's not always set the line style to NONE here.

This one line guarantees that no matter what the real line style is,
it will be ignored.

Change-Id: I3bceaf49ce13ddb42ceb56750d8a4ccfef54033b

chart2/source/view/main/ChartView.cxx

@@ -2401,7 +2401,6 @@ void formatPage(
 
         //format page
         tPropertyNameValueMap aNameValueMap;
-        aNameValueMap.insert( tPropertyNameValueMap::value_type( "LineStyle", uno::makeAny( drawing::LineStyle_NONE )));
         PropertyMapper::getValueMap( aNameValueMap, PropertyMapper::getPropertyNameMapForFillAndLineProperties(), xModelPage );
 
         OUString aCID( ObjectIdentifier::createClassifiedIdentifier( OBJECTTYPE_PAGE, OUString() ) );